ThuliumV1, Pascal, Corpus, bibRecord, 000240

Intense ultraviolet and blue upconversion emissions in Yb3+-Tm3+ codoped stoichiometric Y7O6F9 powder

Identifieur interne : 000240 ( Pascal/Corpus ); précédent : 000239; suivant : 000241

Intense ultraviolet and blue upconversion emissions in Yb3+-Tm3+ codoped stoichiometric Y7O6F9 powder

Auteurs : MO MA ; CHANGFU XU ; LIWEN YANG ; GUOZHONG REN ; JIANGUO LIN ; QIBIN YANG

Source :

Physica. B, Condensed matter [ 0921-4526 ] ; 2011.

RBID : Pascal:11-0316056

Descripteurs français

Pascal (Inist)
- Photoluminescence, Codopage, Coprécipitation, Diffraction RX, Microscopie électronique transmission, Processus n phonons, Addition ytterbium, Addition thulium, Spectre Raman, Yttrium Oxyfluorure, Transfert énergie, Conversion fréquence, Réseau orthorhombique.

English descriptors

KwdEn :
- Codoping, Coprecipitation, Energy transfer, Frequency conversion, Multi-phonon processes, Orthorhombic lattices, Photoluminescence, Raman spectra, Thulium additions, Transmission electron microscopy, XRD, Ytterbium additions, Yttrium Oxyfluorides.

Abstract

Stoichiometric Y₇O₆F₉ powder codoped with Yb³⁺-Tm³⁺was synthesized via co-precipitation and subsequent calcining route. The results of X-ray diffraction and transmission electron microscopy reveal that when the calcining temperature is beyond 800 °C, orthorhombic YF₃ nanoparticles can be completely oxidized into orthorhombic Y₇O₆F₉ powder. Under the excitation of a 980 nm laser, Y₇O₆F₉ powder exhibits multicolor UC emission in regions spanning the UV to the NIR. In addition, the upconversion emission intensities of YF₃, Y₇O₆F₉ and Y₂O₃ powders were compared under the same dopant condition (Yb/Tm=5/0.5 mol%). The low phonon energy revealed by Raman spectra helped to understand the high efficient upconversion emission of Y₇O₆F₉ and the main phonon vibration of Y₇O₆F₉ lies at 472 cm^-1, which is far lower that of Y₂O₃ (at 708 cm^-1). Our results indicate that orthorhombic rare earth ions doped Y₇O₆F₉ is an efficient matrix for UV and blue UC emission, and has potential applications in color displays, anti-counterfeiting and multicolor fluorescent labels.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

A01	`01`	`1`		`@0 0921-4526`
A03		`1`		`@0 Physica, B Condens. matter`
A05				`@2 406`
A06				`@2 17`
A08	`01`	`1`	`ENG`	`@1 Intense ultraviolet and blue upconversion emissions in Yb³⁺-Tm³⁺codoped stoichiometric Y₇O₆F₉ powder`
A11	`01`	`1`		`@1 MO MA`
A11	`02`	`1`		`@1 CHANGFU XU`
A11	`03`	`1`		`@1 LIWEN YANG`
A11	`04`	`1`		`@1 GUOZHONG REN`
A11	`05`	`1`		`@1 JIANGUO LIN`
A11	`06`	`1`		`@1 QIBIN YANG`
A14	`01`			`@1 Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education, Xiangtan University @2 Xiangtan 411105 @3 CHN @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut. @Z 5 aut. @Z 6 aut.`
A14	`02`			`@1 Institute of Modern Physics, Faculty of Material and Photoelectronic Physics, Xiangtan University @2 Xiangtan 411105 @3 CHN @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut. @Z 5 aut. @Z 6 aut.`
A20				`@1 3256-3260`
A21				`@1 2011`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 145B @5 354000189918940260`
A44				`@0 0000 @1 © 2011 INIST-CNRS. All rights reserved.`
A45				`@0 34 ref.`
A47	`01`	`1`		`@0 11-0316056`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Physica. B, Condensed matter`
A66	`01`			`@0 GBR`
C01	`01`		`ENG`	@0 Stoichiometric Y₇O₆F₉ powder codoped with Yb³⁺-Tm³⁺was synthesized via co-precipitation and subsequent calcining route. The results of X-ray diffraction and transmission electron microscopy reveal that when the calcining temperature is beyond 800 °C, orthorhombic YF₃ nanoparticles can be completely oxidized into orthorhombic Y₇O₆F₉ powder. Under the excitation of a 980 nm laser, Y₇O₆F₉ powder exhibits multicolor UC emission in regions spanning the UV to the NIR. In addition, the upconversion emission intensities of YF₃, Y₇O₆F₉ and Y₂O₃ powders were compared under the same dopant condition (Yb/Tm=5/0.5 mol%). The low phonon energy revealed by Raman spectra helped to understand the high efficient upconversion emission of Y₇O₆F₉ and the main phonon vibration of Y₇O₆F₉ lies at 472 cm^-1, which is far lower that of Y₂O₃ (at 708 cm^-1). Our results indicate that orthorhombic rare earth ions doped Y₇O₆F₉ is an efficient matrix for UV and blue UC emission, and has potential applications in color displays, anti-counterfeiting and multicolor fluorescent labels.
C02	`01`	`3`		`@0 001B70H55H`
C03	`01`	`3`	`FRE`	`@0 Photoluminescence @5 02`
C03	`01`	`3`	`ENG`	`@0 Photoluminescence @5 02`
C03	`02`	`X`	`FRE`	`@0 Codopage @5 03`
C03	`02`	`X`	`ENG`	`@0 Codoping @5 03`
C03	`02`	`X`	`SPA`	`@0 Codrogado @5 03`
C03	`03`	`3`	`FRE`	`@0 Coprécipitation @5 04`
C03	`03`	`3`	`ENG`	`@0 Coprecipitation @5 04`
C03	`04`	`3`	`FRE`	`@0 Diffraction RX @5 05`
C03	`04`	`3`	`ENG`	`@0 XRD @5 05`
C03	`05`	`3`	`FRE`	`@0 Microscopie électronique transmission @5 06`
C03	`05`	`3`	`ENG`	`@0 Transmission electron microscopy @5 06`
C03	`06`	`3`	`FRE`	`@0 Processus n phonons @5 07`
C03	`06`	`3`	`ENG`	`@0 Multi-phonon processes @5 07`
C03	`07`	`3`	`FRE`	`@0 Addition ytterbium @5 08`
C03	`07`	`3`	`ENG`	`@0 Ytterbium additions @5 08`
C03	`08`	`3`	`FRE`	`@0 Addition thulium @5 09`
C03	`08`	`3`	`ENG`	`@0 Thulium additions @5 09`
C03	`09`	`3`	`FRE`	`@0 Spectre Raman @5 10`
C03	`09`	`3`	`ENG`	`@0 Raman spectra @5 10`
C03	`10`	`3`	`FRE`	`@0 Yttrium Oxyfluorure @2 NC @2 NA @5 11`
C03	`10`	`3`	`ENG`	`@0 Yttrium Oxyfluorides @2 NC @2 NA @5 11`
C03	`11`	`3`	`FRE`	`@0 Transfert énergie @5 12`
C03	`11`	`3`	`ENG`	`@0 Energy transfer @5 12`
C03	`12`	`X`	`FRE`	`@0 Conversion fréquence @5 14`
C03	`12`	`X`	`ENG`	`@0 Frequency conversion @5 14`
C03	`12`	`X`	`SPA`	`@0 Conversión frecuencia @5 14`
C03	`13`	`3`	`FRE`	`@0 Réseau orthorhombique @5 15`
C03	`13`	`3`	`ENG`	`@0 Orthorhombic lattices @5 15`
N21				`@1 213`

Format Inist (serveur)

NO :	PASCAL 11-0316056 INIST
ET :	Intense ultraviolet and blue upconversion emissions in Yb³⁺-Tm³⁺codoped stoichiometric Y₇O₆F₉ powder
AU :	MO MA; CHANGFU XU; LIWEN YANG; GUOZHONG REN; JIANGUO LIN; QIBIN YANG
AF :	Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education, Xiangtan University/Xiangtan 411105/Chine (1 aut., 2 aut., 3 aut., 4 aut., 5 aut., 6 aut.); Institute of Modern Physics, Faculty of Material and Photoelectronic Physics, Xiangtan University/Xiangtan 411105/Chine (1 aut., 2 aut., 3 aut., 4 aut., 5 aut., 6 aut.)
DT :	Publication en série; Niveau analytique
SO :	Physica. B, Condensed matter; ISSN 0921-4526; Royaume-Uni; Da. 2011; Vol. 406; No. 17; Pp. 3256-3260; Bibl. 34 ref.
LA :	Anglais
EA :	Stoichiometric Y₇O₆F₉ powder codoped with Yb³⁺-Tm³⁺was synthesized via co-precipitation and subsequent calcining route. The results of X-ray diffraction and transmission electron microscopy reveal that when the calcining temperature is beyond 800 °C, orthorhombic YF₃ nanoparticles can be completely oxidized into orthorhombic Y₇O₆F₉ powder. Under the excitation of a 980 nm laser, Y₇O₆F₉ powder exhibits multicolor UC emission in regions spanning the UV to the NIR. In addition, the upconversion emission intensities of YF₃, Y₇O₆F₉ and Y₂O₃ powders were compared under the same dopant condition (Yb/Tm=5/0.5 mol%). The low phonon energy revealed by Raman spectra helped to understand the high efficient upconversion emission of Y₇O₆F₉ and the main phonon vibration of Y₇O₆F₉ lies at 472 cm^-1, which is far lower that of Y₂O₃ (at 708 cm^-1). Our results indicate that orthorhombic rare earth ions doped Y₇O₆F₉ is an efficient matrix for UV and blue UC emission, and has potential applications in color displays, anti-counterfeiting and multicolor fluorescent labels.
CC :	001B70H55H
FD :	Photoluminescence; Codopage; Coprécipitation; Diffraction RX; Microscopie électronique transmission; Processus n phonons; Addition ytterbium; Addition thulium; Spectre Raman; Yttrium Oxyfluorure; Transfert énergie; Conversion fréquence; Réseau orthorhombique
ED :	Photoluminescence; Codoping; Coprecipitation; XRD; Transmission electron microscopy; Multi-phonon processes; Ytterbium additions; Thulium additions; Raman spectra; Yttrium Oxyfluorides; Energy transfer; Frequency conversion; Orthorhombic lattices
SD :	Codrogado; Conversión frecuencia
LO :	INIST-145B.354000189918940260
ID :	11-0316056

Links to Exploration step

Pascal:11-0316056

Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Intense ultraviolet and blue upconversion emissions in Yb<sup>3+</sup>
-Tm<sup>3+ </sup>
codoped stoichiometric Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder</title>
<author><name sortKey="Mo Ma" sort="Mo Ma" uniqKey="Mo Ma" last="Mo Ma">MO MA</name>
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<author><name sortKey="Liwen Yang" sort="Liwen Yang" uniqKey="Liwen Yang" last="Liwen Yang">LIWEN YANG</name>
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<affiliation><inist:fA14 i1="01"><s1>Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education, Xiangtan University</s1>
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<sZ>1 aut.</sZ>
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<author><name sortKey="Jianguo Lin" sort="Jianguo Lin" uniqKey="Jianguo Lin" last="Jianguo Lin">JIANGUO LIN</name>
<affiliation><inist:fA14 i1="01"><s1>Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education, Xiangtan University</s1>
<s2>Xiangtan 411105</s2>
<s3>CHN</s3>
<sZ>1 aut.</sZ>
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</affiliation>
<affiliation><inist:fA14 i1="02"><s1>Institute of Modern Physics, Faculty of Material and Photoelectronic Physics, Xiangtan University</s1>
<s2>Xiangtan 411105</s2>
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<sZ>1 aut.</sZ>
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<author><name sortKey="Qibin Yang" sort="Qibin Yang" uniqKey="Qibin Yang" last="Qibin Yang">QIBIN YANG</name>
<affiliation><inist:fA14 i1="01"><s1>Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education, Xiangtan University</s1>
<s2>Xiangtan 411105</s2>
<s3>CHN</s3>
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<affiliation><inist:fA14 i1="02"><s1>Institute of Modern Physics, Faculty of Material and Photoelectronic Physics, Xiangtan University</s1>
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<series><title level="j" type="main">Physica. B, Condensed matter</title>
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<seriesStmt><title level="j" type="main">Physica. B, Condensed matter</title>
<title level="j" type="abbreviated">Physica, B Condens. matter</title>
<idno type="ISSN">0921-4526</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Codoping</term>
<term>Coprecipitation</term>
<term>Energy transfer</term>
<term>Frequency conversion</term>
<term>Multi-phonon processes</term>
<term>Orthorhombic lattices</term>
<term>Photoluminescence</term>
<term>Raman spectra</term>
<term>Thulium additions</term>
<term>Transmission electron microscopy</term>
<term>XRD</term>
<term>Ytterbium additions</term>
<term>Yttrium Oxyfluorides</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Photoluminescence</term>
<term>Codopage</term>
<term>Coprécipitation</term>
<term>Diffraction RX</term>
<term>Microscopie électronique transmission</term>
<term>Processus n phonons</term>
<term>Addition ytterbium</term>
<term>Addition thulium</term>
<term>Spectre Raman</term>
<term>Yttrium Oxyfluorure</term>
<term>Transfert énergie</term>
<term>Conversion fréquence</term>
<term>Réseau orthorhombique</term>
</keywords>
</textClass>
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<front><div type="abstract" xml:lang="en">Stoichiometric Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder codoped with Yb<sup>3+</sup>
-Tm<sup>3+ </sup>
was synthesized via co-precipitation and subsequent calcining route. The results of X-ray diffraction and transmission electron microscopy reveal that when the calcining temperature is beyond 800 °C, orthorhombic YF<sub>3</sub>
 nanoparticles can be completely oxidized into orthorhombic Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder. Under the excitation of a 980 nm laser, Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder exhibits multicolor UC emission in regions spanning the UV to the NIR. In addition, the upconversion emission intensities of YF<sub>3</sub>
, Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 and Y<sub>2</sub>
O<sub>3</sub>
 powders were compared under the same dopant condition (Yb/Tm=5/0.5 mol%). The low phonon energy revealed by Raman spectra helped to understand the high efficient upconversion emission of Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 and the main phonon vibration of Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 lies at 472 cm<sup>-1</sup>
, which is far lower that of Y<sub>2</sub>
O<sub>3</sub>
 (at 708 cm<sup>-1</sup>
). Our results indicate that orthorhombic rare earth ions doped Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 is an efficient matrix for UV and blue UC emission, and has potential applications in color displays, anti-counterfeiting and multicolor fluorescent labels.</div>
</front>
</TEI>
<inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0921-4526</s0>
</fA01>
<fA03 i2="1"><s0>Physica, B Condens. matter</s0>
</fA03>
<fA05><s2>406</s2>
</fA05>
<fA06><s2>17</s2>
</fA06>
<fA08 i1="01" i2="1" l="ENG"><s1>Intense ultraviolet and blue upconversion emissions in Yb<sup>3+</sup>
-Tm<sup>3+ </sup>
codoped stoichiometric Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>MO MA</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>CHANGFU XU</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>LIWEN YANG</s1>
</fA11>
<fA11 i1="04" i2="1"><s1>GUOZHONG REN</s1>
</fA11>
<fA11 i1="05" i2="1"><s1>JIANGUO LIN</s1>
</fA11>
<fA11 i1="06" i2="1"><s1>QIBIN YANG</s1>
</fA11>
<fA14 i1="01"><s1>Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education, Xiangtan University</s1>
<s2>Xiangtan 411105</s2>
<s3>CHN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
<sZ>6 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Institute of Modern Physics, Faculty of Material and Photoelectronic Physics, Xiangtan University</s1>
<s2>Xiangtan 411105</s2>
<s3>CHN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
<sZ>6 aut.</sZ>
</fA14>
<fA20><s1>3256-3260</s1>
</fA20>
<fA21><s1>2011</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>145B</s2>
<s5>354000189918940260</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2011 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>34 ref.</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>11-0316056</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>Physica. B, Condensed matter</s0>
</fA64>
<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>Stoichiometric Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder codoped with Yb<sup>3+</sup>
-Tm<sup>3+ </sup>
was synthesized via co-precipitation and subsequent calcining route. The results of X-ray diffraction and transmission electron microscopy reveal that when the calcining temperature is beyond 800 °C, orthorhombic YF<sub>3</sub>
 nanoparticles can be completely oxidized into orthorhombic Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder. Under the excitation of a 980 nm laser, Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder exhibits multicolor UC emission in regions spanning the UV to the NIR. In addition, the upconversion emission intensities of YF<sub>3</sub>
, Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 and Y<sub>2</sub>
O<sub>3</sub>
 powders were compared under the same dopant condition (Yb/Tm=5/0.5 mol%). The low phonon energy revealed by Raman spectra helped to understand the high efficient upconversion emission of Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 and the main phonon vibration of Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 lies at 472 cm<sup>-1</sup>
, which is far lower that of Y<sub>2</sub>
O<sub>3</sub>
 (at 708 cm<sup>-1</sup>
). Our results indicate that orthorhombic rare earth ions doped Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 is an efficient matrix for UV and blue UC emission, and has potential applications in color displays, anti-counterfeiting and multicolor fluorescent labels.</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001B70H55H</s0>
</fC02>
<fC03 i1="01" i2="3" l="FRE"><s0>Photoluminescence</s0>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="3" l="ENG"><s0>Photoluminescence</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Codopage</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Codoping</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Codrogado</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>Coprécipitation</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>Coprecipitation</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Diffraction RX</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>XRD</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Microscopie électronique transmission</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Transmission electron microscopy</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Processus n phonons</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>Multi-phonon processes</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Addition ytterbium</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Ytterbium additions</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Addition thulium</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Thulium additions</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Spectre Raman</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Raman spectra</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>Yttrium Oxyfluorure</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG"><s0>Yttrium Oxyfluorides</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Transfert énergie</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Energy transfer</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Conversion fréquence</s0>
<s5>14</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Frequency conversion</s0>
<s5>14</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Conversión frecuencia</s0>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Réseau orthorhombique</s0>
<s5>15</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>Orthorhombic lattices</s0>
<s5>15</s5>
</fC03>
<fN21><s1>213</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 11-0316056 INIST</NO>
<ET>Intense ultraviolet and blue upconversion emissions in Yb<sup>3+</sup>
-Tm<sup>3+ </sup>
codoped stoichiometric Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder</ET>
<AU>MO MA; CHANGFU XU; LIWEN YANG; GUOZHONG REN; JIANGUO LIN; QIBIN YANG</AU>
<AF>Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education, Xiangtan University/Xiangtan 411105/Chine (1 aut., 2 aut., 3 aut., 4 aut., 5 aut., 6 aut.); Institute of Modern Physics, Faculty of Material and Photoelectronic Physics, Xiangtan University/Xiangtan 411105/Chine (1 aut., 2 aut., 3 aut., 4 aut., 5 aut., 6 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Physica. B, Condensed matter; ISSN 0921-4526; Royaume-Uni; Da. 2011; Vol. 406; No. 17; Pp. 3256-3260; Bibl. 34 ref.</SO>
<LA>Anglais</LA>
<EA>Stoichiometric Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder codoped with Yb<sup>3+</sup>
-Tm<sup>3+ </sup>
was synthesized via co-precipitation and subsequent calcining route. The results of X-ray diffraction and transmission electron microscopy reveal that when the calcining temperature is beyond 800 °C, orthorhombic YF<sub>3</sub>
 nanoparticles can be completely oxidized into orthorhombic Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder. Under the excitation of a 980 nm laser, Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 powder exhibits multicolor UC emission in regions spanning the UV to the NIR. In addition, the upconversion emission intensities of YF<sub>3</sub>
, Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 and Y<sub>2</sub>
O<sub>3</sub>
 powders were compared under the same dopant condition (Yb/Tm=5/0.5 mol%). The low phonon energy revealed by Raman spectra helped to understand the high efficient upconversion emission of Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 and the main phonon vibration of Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 lies at 472 cm<sup>-1</sup>
, which is far lower that of Y<sub>2</sub>
O<sub>3</sub>
 (at 708 cm<sup>-1</sup>
). Our results indicate that orthorhombic rare earth ions doped Y<sub>7</sub>
O<sub>6</sub>
F<sub>9</sub>
 is an efficient matrix for UV and blue UC emission, and has potential applications in color displays, anti-counterfeiting and multicolor fluorescent labels.</EA>
<CC>001B70H55H</CC>
<FD>Photoluminescence; Codopage; Coprécipitation; Diffraction RX; Microscopie électronique transmission; Processus n phonons; Addition ytterbium; Addition thulium; Spectre Raman; Yttrium Oxyfluorure; Transfert énergie; Conversion fréquence; Réseau orthorhombique</FD>
<ED>Photoluminescence; Codoping; Coprecipitation; XRD; Transmission electron microscopy; Multi-phonon processes; Ytterbium additions; Thulium additions; Raman spectra; Yttrium Oxyfluorides; Energy transfer; Frequency conversion; Orthorhombic lattices</ED>
<SD>Codrogado; Conversión frecuencia</SD>
<LO>INIST-145B.354000189918940260</LO>
<ID>11-0316056</ID>
</server>
</inist>
</record>

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Intense ultraviolet and blue upconversion emissions in Yb3+-Tm3+ codoped stoichiometric Y7O6F9 powder

Intense ultraviolet and blue upconversion emissions in Yb3+-Tm3+ codoped stoichiometric Y7O6F9 powder

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